49. In the last sentence of the passage, the author can best bedescribed as doing which of the following?
(A) Offering a way of addressing a challenge posed at thebeginning of the passage.
(B) Introducing the last of a series of examples supportingthe thesis proposed at the beginning of the passage.
(C) Inviting further discussion of the issues raised in thepassage.
(D) Rejecting an argument cited by the author in thepreceding sentence.